diff options
Diffstat (limited to 'drivers/gpu/drm/tegra/hdmi.c')
-rw-r--r-- | drivers/gpu/drm/tegra/hdmi.c | 226 |
1 files changed, 109 insertions, 117 deletions
diff --git a/drivers/gpu/drm/tegra/hdmi.c b/drivers/gpu/drm/tegra/hdmi.c index d4f3fb9f0c29..bb747f6cd1a4 100644 --- a/drivers/gpu/drm/tegra/hdmi.c +++ b/drivers/gpu/drm/tegra/hdmi.c @@ -10,12 +10,15 @@ #include <linux/clk.h> #include <linux/debugfs.h> #include <linux/gpio.h> +#include <linux/hdmi.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/regulator/consumer.h> #include <linux/clk/tegra.h> +#include <drm/drm_edid.h> + #include "hdmi.h" #include "drm.h" #include "dc.h" @@ -400,54 +403,65 @@ static int tegra_hdmi_setup_audio(struct tegra_hdmi *hdmi, unsigned int pclk) return 0; } -static void tegra_hdmi_write_infopack(struct tegra_hdmi *hdmi, - unsigned int offset, u8 type, - u8 version, void *data, size_t size) +static inline unsigned long tegra_hdmi_subpack(const u8 *ptr, size_t size) { - unsigned long value; - u8 *ptr = data; - u32 subpack[2]; + unsigned long value = 0; size_t i; - u8 csum; - /* first byte of data is the checksum */ - csum = type + version + size - 1; + for (i = size; i > 0; i--) + value = (value << 8) | ptr[i - 1]; - for (i = 1; i < size; i++) - csum += ptr[i]; + return value; +} - ptr[0] = 0x100 - csum; +static void tegra_hdmi_write_infopack(struct tegra_hdmi *hdmi, const void *data, + size_t size) +{ + const u8 *ptr = data; + unsigned long offset; + unsigned long value; + size_t i, j; - value = INFOFRAME_HEADER_TYPE(type) | - INFOFRAME_HEADER_VERSION(version) | - INFOFRAME_HEADER_LEN(size - 1); - tegra_hdmi_writel(hdmi, value, offset); + switch (ptr[0]) { + case HDMI_INFOFRAME_TYPE_AVI: + offset = HDMI_NV_PDISP_HDMI_AVI_INFOFRAME_HEADER; + break; - /* The audio inforame only has one set of subpack registers. The hdmi - * block pads the rest of the data as per the spec so we have to fixup - * the length before filling in the subpacks. - */ - if (offset == HDMI_NV_PDISP_HDMI_AUDIO_INFOFRAME_HEADER) - size = 6; + case HDMI_INFOFRAME_TYPE_AUDIO: + offset = HDMI_NV_PDISP_HDMI_AUDIO_INFOFRAME_HEADER; + break; - /* each subpack 7 bytes devided into: - * subpack_low - bytes 0 - 3 - * subpack_high - bytes 4 - 6 (with byte 7 padded to 0x00) - */ - for (i = 0; i < size; i++) { - size_t index = i % 7; + case HDMI_INFOFRAME_TYPE_VENDOR: + offset = HDMI_NV_PDISP_HDMI_GENERIC_HEADER; + break; + + default: + dev_err(hdmi->dev, "unsupported infoframe type: %02x\n", + ptr[0]); + return; + } + + value = INFOFRAME_HEADER_TYPE(ptr[0]) | + INFOFRAME_HEADER_VERSION(ptr[1]) | + INFOFRAME_HEADER_LEN(ptr[2]); + tegra_hdmi_writel(hdmi, value, offset); + offset++; - if (index == 0) - memset(subpack, 0x0, sizeof(subpack)); + /* + * Each subpack contains 7 bytes, divided into: + * - subpack_low: bytes 0 - 3 + * - subpack_high: bytes 4 - 6 (with byte 7 padded to 0x00) + */ + for (i = 3, j = 0; i < size; i += 7, j += 8) { + size_t rem = size - i, num = min_t(size_t, rem, 4); - ((u8 *)subpack)[index] = ptr[i]; + value = tegra_hdmi_subpack(&ptr[i], num); + tegra_hdmi_writel(hdmi, value, offset++); - if (index == 6 || (i + 1 == size)) { - unsigned int reg = offset + 1 + (i / 7) * 2; + num = min_t(size_t, rem - num, 3); - tegra_hdmi_writel(hdmi, subpack[0], reg); - tegra_hdmi_writel(hdmi, subpack[1], reg + 1); - } + value = tegra_hdmi_subpack(&ptr[i + 4], num); + tegra_hdmi_writel(hdmi, value, offset++); } } @@ -455,9 +469,8 @@ static void tegra_hdmi_setup_avi_infoframe(struct tegra_hdmi *hdmi, struct drm_display_mode *mode) { struct hdmi_avi_infoframe frame; - unsigned int h_front_porch; - unsigned int hsize = 16; - unsigned int vsize = 9; + u8 buffer[17]; + ssize_t err; if (hdmi->dvi) { tegra_hdmi_writel(hdmi, 0, @@ -465,69 +478,19 @@ static void tegra_hdmi_setup_avi_infoframe(struct tegra_hdmi *hdmi, return; } - h_front_porch = mode->hsync_start - mode->hdisplay; - memset(&frame, 0, sizeof(frame)); - frame.r = HDMI_AVI_R_SAME; - - switch (mode->vdisplay) { - case 480: - if (mode->hdisplay == 640) { - frame.m = HDMI_AVI_M_4_3; - frame.vic = 1; - } else { - frame.m = HDMI_AVI_M_16_9; - frame.vic = 3; - } - break; - - case 576: - if (((hsize * 10) / vsize) > 14) { - frame.m = HDMI_AVI_M_16_9; - frame.vic = 18; - } else { - frame.m = HDMI_AVI_M_4_3; - frame.vic = 17; - } - break; - - case 720: - case 1470: /* stereo mode */ - frame.m = HDMI_AVI_M_16_9; - - if (h_front_porch == 110) - frame.vic = 4; - else - frame.vic = 19; - break; - - case 1080: - case 2205: /* stereo mode */ - frame.m = HDMI_AVI_M_16_9; - - switch (h_front_porch) { - case 88: - frame.vic = 16; - break; - - case 528: - frame.vic = 31; - break; - - default: - frame.vic = 32; - break; - } - break; + err = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode); + if (err < 0) { + dev_err(hdmi->dev, "failed to setup AVI infoframe: %zd\n", err); + return; + } - default: - frame.m = HDMI_AVI_M_16_9; - frame.vic = 0; - break; + err = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer)); + if (err < 0) { + dev_err(hdmi->dev, "failed to pack AVI infoframe: %zd\n", err); + return; } - tegra_hdmi_write_infopack(hdmi, HDMI_NV_PDISP_HDMI_AVI_INFOFRAME_HEADER, - HDMI_INFOFRAME_TYPE_AVI, HDMI_AVI_VERSION, - &frame, sizeof(frame)); + tegra_hdmi_write_infopack(hdmi, buffer, err); tegra_hdmi_writel(hdmi, INFOFRAME_CTRL_ENABLE, HDMI_NV_PDISP_HDMI_AVI_INFOFRAME_CTRL); @@ -536,6 +499,8 @@ static void tegra_hdmi_setup_avi_infoframe(struct tegra_hdmi *hdmi, static void tegra_hdmi_setup_audio_infoframe(struct tegra_hdmi *hdmi) { struct hdmi_audio_infoframe frame; + u8 buffer[14]; + ssize_t err; if (hdmi->dvi) { tegra_hdmi_writel(hdmi, 0, @@ -543,14 +508,29 @@ static void tegra_hdmi_setup_audio_infoframe(struct tegra_hdmi *hdmi) return; } - memset(&frame, 0, sizeof(frame)); - frame.cc = HDMI_AUDIO_CC_2; + err = hdmi_audio_infoframe_init(&frame); + if (err < 0) { + dev_err(hdmi->dev, "failed to initialize audio infoframe: %d\n", + err); + return; + } + + frame.channels = 2; + + err = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer)); + if (err < 0) { + dev_err(hdmi->dev, "failed to pack audio infoframe: %zd\n", + err); + return; + } - tegra_hdmi_write_infopack(hdmi, - HDMI_NV_PDISP_HDMI_AUDIO_INFOFRAME_HEADER, - HDMI_INFOFRAME_TYPE_AUDIO, - HDMI_AUDIO_VERSION, - &frame, sizeof(frame)); + /* + * The audio infoframe has only one set of subpack registers, so the + * infoframe needs to be truncated. One set of subpack registers can + * contain 7 bytes. Including the 3 byte header only the first 10 + * bytes can be programmed. + */ + tegra_hdmi_write_infopack(hdmi, buffer, min(10, err)); tegra_hdmi_writel(hdmi, INFOFRAME_CTRL_ENABLE, HDMI_NV_PDISP_HDMI_AUDIO_INFOFRAME_CTRL); @@ -558,8 +538,10 @@ static void tegra_hdmi_setup_audio_infoframe(struct tegra_hdmi *hdmi) static void tegra_hdmi_setup_stereo_infoframe(struct tegra_hdmi *hdmi) { - struct hdmi_stereo_infoframe frame; + struct hdmi_vendor_infoframe frame; unsigned long value; + u8 buffer[10]; + ssize_t err; if (!hdmi->stereo) { value = tegra_hdmi_readl(hdmi, HDMI_NV_PDISP_HDMI_GENERIC_CTRL); @@ -569,22 +551,32 @@ static void tegra_hdmi_setup_stereo_infoframe(struct tegra_hdmi *hdmi) } memset(&frame, 0, sizeof(frame)); - frame.regid0 = 0x03; - frame.regid1 = 0x0c; - frame.regid2 = 0x00; - frame.hdmi_video_format = 2; + + frame.type = HDMI_INFOFRAME_TYPE_VENDOR; + frame.version = 0x01; + frame.length = 6; + + frame.data[0] = 0x03; /* regid0 */ + frame.data[1] = 0x0c; /* regid1 */ + frame.data[2] = 0x00; /* regid2 */ + frame.data[3] = 0x02 << 5; /* video format */ /* TODO: 74 MHz limit? */ if (1) { - frame._3d_structure = 0; + frame.data[4] = 0x00 << 4; /* 3D structure */ } else { - frame._3d_structure = 8; - frame._3d_ext_data = 0; + frame.data[4] = 0x08 << 4; /* 3D structure */ + frame.data[5] = 0x00 << 4; /* 3D ext. data */ + } + + err = hdmi_vendor_infoframe_pack(&frame, buffer, sizeof(buffer)); + if (err < 0) { + dev_err(hdmi->dev, "failed to pack vendor infoframe: %zd\n", + err); + return; } - tegra_hdmi_write_infopack(hdmi, HDMI_NV_PDISP_HDMI_GENERIC_HEADER, - HDMI_INFOFRAME_TYPE_VENDOR, - HDMI_VENDOR_VERSION, &frame, 6); + tegra_hdmi_write_infopack(hdmi, buffer, err); value = tegra_hdmi_readl(hdmi, HDMI_NV_PDISP_HDMI_GENERIC_CTRL); value |= GENERIC_CTRL_ENABLE; |